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Updated: May 24, 2025

Simple Bulk Readout of Digital Nucleic Acid Quantification Assays

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Published on: September 24, 2015

Isotope Dilution DNA Logic Circuits for Multiple Output and Absolute Quantification.

Yiyan Zhu¹, Chao Wei², Ziyan Li³

¹Key Laboratory of Green Chemistry & Technology, College of Chemistry, Sichuan University, Chengdu 610064, P.R. China.

Analytical Chemistry

|March 6, 2025

Summary

This study introduces DNA logic circuits using lanthanide isotopes for precise microRNA quantification. This novel approach overcomes limitations of optical methods, enhancing accuracy for potential cancer biomarker diagnostics.

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Last Updated: May 24, 2025

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DNA Stable-Isotope Probing DNA-SIP

DNA Stable-Isotope Probing DNA-SIP

Published on: August 2, 2010

Area of Science:

Biotechnology
Molecular Diagnostics
Nanotechnology

Background:

DNA logic circuits offer scalable and accurate computation but face challenges.
Optical probes used in DNA circuits suffer from spectral interference for complex analyses.
Absolute quantification of analytes in DNA circuits is difficult, hindering interlaboratory comparisons.

Purpose of the Study:

To develop a novel DNA logic circuit system for accurate microRNA quantification.
To overcome the limitations of spectral interference and absolute quantification in DNA-based computation.
To explore the potential of isotopic DNA logic circuits for cancer biomarker diagnosis.

Main Methods:

Constructed DNA logic circuits encoded with specific lanthanide isotopes (gadolinium-155 and neodymium-145).
Utilized isotope dilution coupled with elemental mass spectrometry for signal decoding and quantification.
Incorporated enriched ¹⁵⁵Gd and ¹⁴⁵Nd isotopes for precise microRNA detection.

Main Results:

The developed isotopic DNA logic circuits demonstrated enhanced multiplexity and computational accuracy.
Achieved absolute quantification of microRNAs traceable to the international system of units.
Successfully addressed spectral overlapping interference issues inherent in optical detection methods.

Conclusions:

Isotopic DNA logic circuits offer a robust platform for sensitive and accurate microRNA detection.
This technology significantly improves the reliability of DNA logic circuit-based diagnostics.
The approach holds great potential for advancing cancer biomarker discovery and clinical diagnosis.